Preparation of a deuterated-tritiated polymer via solid state catalytic tritiation of deuterated polycyclooctene

A deuterated-tritiated polymer was prepared via addition reaction and isotopic exchange between a deuterated polycyclooctene and tritium in the presence of a Pd/BaSO4 catalyst, free of solvents. After reaction, the gas sample from the vessel was analyzed with mass spectrometer, and compared with the raw T2/Ar mixture. It was demonstrated that isotopic exchange as well as hydrogen addition reaction occurred in the tritiation experiment. The abundance of tritium in the deuterated-tritiated polymer was determined to be 17.7%. The deuterated-tritiated polymer dissolved in CDCl3 was characterized by 2H NMR and 3H NMR spectra. By using the solvent-free tritiation method, the generation of waste radioactive liquids can be avoided, and the deuterated-tritiated polymer can be kept away from the protiums of solvents.